Blower drive and support



Feb. 15, 1938. o. D. H. BENTLEY 2,108,703

BLOWER DRIVE AND SUPPORT Filed Dec. '7, 1935 5 Sheets-Sheet 1 OL/vEz .0. H. BENTLEY b W \7 m lfififiomwg Feb. 15, 1938. o, BENTLEY 2,108,703

BLOWER DRIVE AND SUPPORT Filed Dec. '7, 1935 3 Sheets-Sheet 2 38 j 129'. Z. I 9 14 .11 11 13 13 /i'-" r 7 Z0 1 a e z 2i i a 1 Z2 i as 36 2e 24 25 z7 Iwveflfior OL/vE/e D. H. BENTLEY by W 7% wfifiorneg Feb. 15, 1938. o. D. H. BENTLEY BLOWER DRIVE AND SUPPORT 3 Sheets-Sheet 5 Filed Dec. 7, 1935 W H W Patented Feb. 15, 1938 UNITED STATES BLOWER DRIVE AND SUPPORT Oliver D. H. Bentley, Norfolk, Mass, assignor to B. F. Sturtevant Company, Inc.,,'Boston, Mala.

Application December 7, 1935, Serial No. 53,369

7 Claims.

This invention relates to direct driven blowers and relates more particularly to turbine driven .blowers.

In some locations, such for example as on naval vessels where space is limited, it is desired that the blowers used, be direct driven and that a single simple and rugged structure support both the blower and its driving turbine, usually from a deck or wall plate. It has been proposed in the past, to suspend the blower and driving mechanism from the deck from an encircling support to which both the blower and its driving mechanism are fastened.

According to this invention, a single upper thrust bearing, although of course more than one bearing may be used, supports both the rotating and stationary structure of a turbine driven blower and the entire mechanism is supported by the housing of the thrust bearing from the deck, wall or other support to which it is desired to attach the assembly.

According to a feature of the invention, the rotating and stationary mechanism are supported from an upper thrust bearing and the stationary structure is supported upon a lower hearing which, however, is itself supported with the other mechanism from the upper bearing.

According to another feature of the invention, the stationary structure supported on the lower bearing is prevented from rotation by the piping conveying the steam to and from the turbine.

An object of the invention is to support the rotating and stationary mechanism of a direct driven blower from an overhead thrust bearing.

Another object of the invention is to support a blower and a steam turbine for driving same from an overhead thrust bearing, attached to an overhead support.

Other objects of the invention will be apparent from the following description taken together with the drawings.

The invention will now be described with reference to the drawings, of which:

Fig. 1 is a side elevation, with a portion in section of a turbine driven blower assembled and upported according to this invention;

Fig. 2 is a transverse sectional view of the assembly of Fig. 1;

Fig. 3 is a sectional view along the lines 3--3 of Fig. 2; and

Fig. 4 is a sectional view along the lines 4-4 of Fig. 2.

Referring now to.Figs. 1 and 2, the numeral 6 identifies a deck or wall, within the opening I of which it is desired, to mount a direct driven blower to be supported entirely from the deck or wall 6. I

The stream-lined cross-members 8 which serve both as inlet vanes and as supporting members, are joined at one end to the angle plates 9 which 5 are suitably attached by bolting or otherwise to the members 8. The cross-members 8 are joined at the other end to the frame Ill within which the outer race ll of a thrust ball bearing is seated as illustrated by Fig. 2. The shaft I2 is 10 supported from the inner race i3 of the bearing by the nut I4 which is screwed upon the threaded upper end of the shaft, and which rests upon the inner race l3.

The blower comprises the blades l5, attached 15 to the hub Hi, the inner member I! of which fits closely around the shaft I2. The hub member I! is seated at its lower end upon an enlargement of the shaft l2. The nut l8 which in turn is screwed on to the threaded portion l9 of the shaft [2 maintains the hub member in position. The nut 20 serves as a lock nut for the nut l8.

The rotor 2| of the turbine 22 is secured to the shaft l2 so as to be able to rotate same. The stationary structure of the turbine and the inner air guiding casing 23 are supported from the shaft l2 by means of a lower ball bearing, the inner race 24 of which is seated upon the nut 25 screwed upon the threaded lower end of the shaft l2. The stationary apparatus is all 30 supported upon the outer race 26 of the lower bearing, through the intermediary of the flange 21 to which is bolted the lower cover 28 and from which is supported the casing 29 of the turbine.

It is not intended however, that the entire 5 weight of this stationary apparatus be supported by the lower bearing alone. The steam inlet and outlet pipes, 33 and 31 respectively, (Figs. 3 and 4) are arranged to support a portion of the weight of the stationary apparatus and other 40 supports may be provided.

The inner air guiding casing 23 is supported upon the flange 30 of the casing 29. The outer air guiding casing 3| may be supported from the wall 6 by means of bolts or screws placed through 45 the angled portions 32.

The steam inlet and outlet pipes are utilized to prevent rotation of the casing of the turbine as will be explained with reference to Figs. 2 and 4. The inlet pipe 33 has the rectangular 50 discharge portion 35 which is attached by the bolt 36, to the under side of the casing 29. The steam outlet pipe 31 is attached to the upper portion of the casing 29. By the tangential arrangement of the oppositely directed pipes 33 and 31, the tendency of the turbine casing II to rotate is counteracted both by the reaction ail'orded by the steam flow through the pipes 38 and I1 and by the physical action of the pipes.

The stream-lined cover I. over the upper' thrust bearing, the stream-linedcross-member I. the stream-lined hub It and the deflector casings 28 and ii are all so arranged and deturbine around and from said bearing, means for preventing the rotation of said stationary struc-.

ture around said bearing, a thrust hearing at the upper end oi said shaft, and means for supporting said blower assembly from said thrust bearing.

2. A blower assembly comprising in combination, a vertical shaft, blower blades mounted on said shaft, a steam turbine having rotatingand stationary structure, a bearing around the lower end of said shaft and supported thereby, ,means for supporting the stationary structure of said turbine around and from said bearing, means for preventing the rotation of said stationary structure around said bearing, a thrust bearing at the upper end of said shaft, means for supportingsaid shaft from said thrust bearing, and

means for attaching said thrust bearing to a mounting for said assembly.

3. A blower assembly comprising in combination, a vertical shaft, blower blades mounted on said shaft, a steam turbine having rotating and stationary structure, a bearing around the lower end of said shaft and supported thereby, means for supporting the stat onary structure of said turbine around and from said bearing, means for preventing the rotation of said stationary structure around said bearing, a thrust hearing at the upperend of said shaft, means for supporting said shaft from said thrust bearing, a plurality of stream-lined transverse cross memsuoavos bers supporting saidthrust'bearing, and means for attaching said cross for said assembly.

4. A blower assembly comprising in combina tion, a vertical shaft, blower blades mounted on said shaft. a steam turbine having rotating and stationary structure, a bearing around the lower end of said shaft and supported thereby, means for supporting the stationary structure of said turbine around and from said bearing; a thrust hearing at the upper end of said shaft, means for supporting said shaft from said thrust bearing, means for conveying steam to and from said turbine, and means for opposing rotation of said stationary structure of said turbine around said first mentioned bearing by said last. mentioned means.

5. A blower assembly comprising in combination, a vertical shaft, blower blades mounted on said shaft, a steam turbine having rotating and stationary structure, a bearing around the lower end of said shaft and supported thereby, an'air guiding casing, means for supporting the stationary structure of said turbine and said casing from said bearing, means for preventing the rotation of said stationary structure around said bearing, a thrust hearing at the upper end of said shaft, and means for supporting said blower assembly from said thrust bearing.

6. A blower assembly comprising in combination, a vertical shaft, blower blades mounted on said shaft, a steam turbine having rotary and stationary structure, means for mounting said rotary structure upon said shaft, a bearing around the lower end of said shaft and supported thereby, means for supporting said stationary structure from said bearing, means for preventing the rotation of said stationary structure around said bearing, a thrust bearing at the upper end of said shaft, and means for supporting said shaft from said thrust bearing.

7. A blower assembly comprising in combination, a shaft, thrust bearings around and attached to the ends of said shaft, a blower rotor on said shaft adjacent one of said bearings, a turbine rotor on said shaft adjacent the other of said bearings, a turbine casing, means for supporting said casing from said shaft by said other of said bearings, means for preventing the rotation of said casing around said other of said bearings, mounting means, and means for supporting said shaft from said mounting means by said one of said bearings.

OLIVER D. H. BENTLEY.

members to a mounting 

